Lay down and take some ibeprofun or drink some water?
<span>The
mass of an atom comes from the protons and neutrons that are found in the
nucleus. The number of protons is the atomic number of an element. To find the
number of neutrons, subtract the atomic number from the mass of an atom. So the number of neutrons are 20 (mass number) - 5 (atomic number) = 15 neutrons.</span>
Answer:
Where is the video and what are the questions??
Explanation:
Answer:
it is also transfer in chemical energy
